By YOUKYUNG LEE 
AP Technology Writer

SEOUL, South Korea (AP) - South Korean TV manufacturers are making billion-dollar bets on a new display technology that promises an even thinner screen and imagery of eye-popping clarity. It might prove to be a costly last gasp of innovation from an industry finding it harder to excite consumers wowed by smartphones and tablets.

Undeterred by a flop in 3-D TV and a failure of Internet-connected TVs to boost sales, Samsung Electronics Co. and LG Electronics Inc. are hoping "OLED" technology will keep them ahead. The intensely competitive business has already caused Sony's TV business to lose money for the past eight years.

The arrival of flat-screen televisions 15 years ago was an advance in TV technology that tantalized consumers nearly as much as color televisions in the late 1960s. The first generation of flat screens now look obese next to the most recent ultra-thin TVs. Picture quality has also made giant strides.

But for most consumers, such incremental changes matter less and less. Why pay for great picture clarity when good quality will do? And why pay more for a TV when smartphones and tablet computers can offer a similar function and much more?

When South Korean Lee Sang-hyun decided to get his first television, his priority was to find a reasonably priced TV with a screen big enough to play games. The 30-year-old office worker had a tight budget after splurging on pricey gadgets: an iPhone, an iPad and a laptop computer.

To slim down, he picked a 42-inch plasma TV without fancy features. He paid 640,000 won ($550) _ less than half of the highest-end television of the same size.

Consumers such as Lee epitomize the tough challenges facing makers of high-end displays. As TVs no longer enjoy a monopoly over broadcasting moving images, consumers' viewing habits are changing. People are spending less time watching live TV shows in the living room. Smartphones and tablet computers can stream live shows and videos on demand.

But Samsung and LG are giddy about a technological leap that they are comparing to the invention of the first color TV in the early 1950s. Wafer-thin OLED, or organic light-emitting diode, television sets boast vivid, saturated colors and deeper contrast than the TV displays now available.

They hope the technology will let them charge more for TVs in the face of quickly eroding profit margins and heightened competition from Chinese makers.

There is at least one catch in the near term, though. As Samsung and LG are not yet prepared for mass production, people will have to spend thousands of dollars more for this new technology.

Set to hit shelves in selected European, Asian and North American markets in time for the Christmas shopping season, the 55-inch OLED TVs by Samsung and LG will cost at least $9,000. That's more than twice as expensive as the top 55-inch model currently available.

OLED "is the closest to the display of dreams," said Lee Kyungshik, vice president of Samsung's TV business.

Samsung's visual display division, which makes TVs and home entertainment systems, accounted for about 17 percent of the company's 45.3 trillion won ($39 billion) of revenue in the first quarter. LG's home electronics division contributed more than 40 percent of its 12.2 trillion won of quarterly revenue.

Samsung and LG have reason to be proud of their latest achievement in display technology. Even though Sony showed off the first OLED TV in 2007 with an 11-inch screen, a bigger display never followed.

"Until the end of next year, only two companies in the world will have a capacity to make (large screen) OLED TVs: Samsung and LG," said Jang Moon-ik, director of LG's TV business.

The last year was tough for the entire TV industry as the European debt crisis and a slow turnaround in the U.S. economy sapped demand for consumer electronics. The notable exceptions were smartphones and tablet computers.

Sales growth in LCD, or liquid-crystal display, televisions slowed, while sales of plasma TVs dropped. In 2011, worldwide annual TV shipments fell for the first time since 2004, according to NPD DisplaySearch.

The feeble global demand hit Sony Corp. especially hard. It lost a record $5.7 billion in 2011. It was the eighth straight year that once-trend-setting Japanese firm lost money in its mainstay TV business.

Samsung and LG weathered the downturn in the TV industry well enough to keep cash to invest in production lines for the new display technology. They believe its profitability will not fall as quickly as LCD TVs because the technological gap is wide enough to fend off late-coming rivals.